/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import com.google.inject.Inject;
import com.google.inject.Singleton;
import exception.BuildNameNotSetException;
import exception.MachineInfoNotCompleteException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import model.Machine;
import model.VMMachine;
import model.MachineManager;

/**
 *
 * @author pyin
 */
//@Singleton
//public class RecentTestResultServlet extends HttpServlet {
//
//    @Inject
//    TestResultManager testResultManager;
//
//    /**
//     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
//     * @param request servlet request
//     * @param response servlet response
//     * @throws ServletException if a servlet-specific error occurs
//     * @throws IOException if an I/O error occurs
//     */
//    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
//            throws ServletException, IOException {
//        response.setContentType("text/html;charset=UTF-8");
//        PrintWriter out = response.getWriter();
//        try {
//            /* TODO output your page here
//            out.println("<html>");
//            out.println("<head>");
//            out.println("<title>Servlet RecentTestResultServlet</title>");
//            out.println("</head>");
//            out.println("<body>");
//            out.println("<h1>Servlet RecentTestResultServlet at " + request.getContextPath () + "</h1>");
//            out.println("</body>");
//            out.println("</html>");
//             */
//        } finally {
//            out.close();
//        }
//    }
//
//    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
//    /**
//     * Handles the HTTP <code>GET</code> method.
//     * @param request servlet request
//     * @param response servlet response
//     * @throws ServletException if a servlet-specific error occurs
//     * @throws IOException if an I/O error occurs
//     */
//    @Override
//    protected void doGet(HttpServletRequest request, HttpServletResponse response)
//            throws ServletException, IOException {
//        PrintWriter out = response.getWriter();
//        TestResult[] results = this.testResultManager.getRecentResults();
//        if (results.length > 0) {
//            for (int i = results.length -1 ; i >= 0; i--) {
//                TestResult result = results[i];
//                if (result.isPassed()) {
//                    out.println("<div class='success'>" + result.getShortName() + "</div>");
//                } else {
//                    out.println("<div class='error'>" + result.getShortName() + "&nbsp;<a href=testResultDetail?logfile=" + result.getName() + " target='_blank'>details</a></div>");
//                }
//            }
//        } else {
//            out.println("No recent test result.");
//        }
//    }
//
//    /**
//     * Handles the HTTP <code>POST</code> method.
//     * @param request servlet request
//     * @param response servlet response
//     * @throws ServletException if a servlet-specific error occurs
//     * @throws IOException if an I/O error occurs
//     */
//    @Override
//    protected void doPost(HttpServletRequest request, HttpServletResponse response)
//            throws ServletException, IOException {
//        processRequest(request, response);
//    }
//
//    /**
//     * Returns a short description of the servlet.
//     * @return a String containing servlet description
//     */
//    @Override
//    public String getServletInfo() {
//        return "Short description";
//    }// </editor-fold>
//}
@Singleton
public class RecentTestResultServlet extends HttpServlet {

    private MachineManager machineFactory;

    @Inject
    public RecentTestResultServlet(MachineManager factory) {
        this.machineFactory = factory;
    }

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet VMStateServlet</title>");
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet VMStateServlet at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
             */
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        List machines = this.machineFactory.getVMMachines();
        Iterator it = machines.iterator();
        while (it.hasNext()) {
            Machine machine = (Machine) it.next();
            if (machine instanceof VMMachine) {
                renderMachine((VMMachine) machine, response);
            }

        }
    }

    private void renderMachine(VMMachine machine, HttpServletResponse response) {
        try {
            boolean hostingMachineRunning;
            boolean vmReady;
            boolean isMachineRunning;
            hostingMachineRunning = machine.isHostingMachineReady();
            if (hostingMachineRunning) {
                isMachineRunning = machine.isStarted();
                if (isMachineRunning) {
                    vmReady = machine.hasCurrentBuildSnapshot();
                    if (hostingMachineRunning && vmReady) {
                        response.getWriter().print("<div class='success'>" + machine.getName() + " is OK.</div><br>");
                    }
                    if (!hostingMachineRunning) {
                        response.getWriter().print("hosting machine for " + machine.getName() + " is down<br>");
                    }
                    if (hostingMachineRunning && !vmReady) {
                        response.getWriter().print(machine.getName() + " is not setup<br>");
                    }
                }
            }
        } catch (BuildNameNotSetException e) {
            try {
                response.getWriter().print(e.getMessage() + "<br>");
            } catch (IOException ex) {
                Logger.getLogger(VMStateServlet.class.getName()).log(Level.SEVERE, null, ex);
            }
        } catch (IOException e) {
        }
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}